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, 63 struct snd_midi_channel *chan) 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, 96 int note, struct snd_midi_channel *chan) 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 124 static void debug_alloc(struct snd_opl3 *opl3, char *s, int voice) { 125 int i; 126 char *str = "x.24"; 127 128 printk(KERN_DEBUG "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 */ 138 static int opl3_get_voice(struct snd_opl3 *opl3, int instr_4op, 139 struct snd_midi_channel *chan) { 140 int chan_4op_1; /* first voice for 4op instrument */ 141 int chan_4op_2; /* second voice for 4op instrument */ 142 143 struct snd_opl3_voice *vp, *vp2; 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(KERN_DEBUG "%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 { 239 240 struct snd_opl3 *opl3 = (struct snd_opl3 *)data; 241 unsigned long flags; 242 int again = 0; 243 int i; 244 245 spin_lock_irqsave(&opl3->sys_timer_lock, flags); 246 for (i = 0; i < opl3->max_voices; i++) { 247 struct snd_opl3_voice *vp = &opl3->voices[i]; 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 } 261 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); 262 } 263 264 /* 265 * Start system timer 266 */ 267 static void snd_opl3_start_timer(struct snd_opl3 *opl3) 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 */ 289 void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan) 290 { 291 struct snd_opl3 *opl3; 292 int instr_4op; 293 294 int voice; 295 struct snd_opl3_voice *vp, *vp2; 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; 307 unsigned char prg, bank; 308 309 int key = note; 310 unsigned char fnum, blocknum; 311 int i; 312 313 struct fm_patch *patch; 314 struct fm_instrument *fm; 315 unsigned long flags; 316 317 opl3 = p; 318 319 #ifdef DEBUG_MIDI 320 snd_printk(KERN_DEBUG "Note on, ch %i, inst %i, note %i, vel %i\n", 321 chan->number, chan->midi_program, note, vel); 322 #endif 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 */ 329 bank = 128; 330 prg = note; 331 } else { 332 bank = chan->gm_bank_select; 333 prg = chan->midi_program; 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 */ 341 bank = 127; 342 prg = chan->midi_program; 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: 354 patch = snd_opl3_find_patch(opl3, prg, bank, 0); 355 if (!patch) { 356 spin_unlock_irqrestore(&opl3->voice_lock, flags); 357 return; 358 } 359 360 fm = &patch->inst; 361 switch (patch->type) { 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: 371 spin_unlock_irqrestore(&opl3->voice_lock, flags); 372 return; 373 } 374 #ifdef DEBUG_MIDI 375 snd_printk(KERN_DEBUG " --> OPL%i instrument: %s\n", 376 instr_4op ? 3 : 2, patch->name); 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(KERN_DEBUG " --> 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(KERN_DEBUG " --> 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(KERN_DEBUG " --> 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; 566 567 /* 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) { 597 bank = 128; 598 /* percussions start at 35 */ 599 prg = extra_prg - 128 + 35 - 1; 600 } else { 601 bank = 0; 602 prg = extra_prg - 1; 603 } 604 #ifdef DEBUG_MIDI 605 snd_printk(KERN_DEBUG " *** allocating extra program\n"); 606 #endif 607 goto __extra_prg; 608 } 609 spin_unlock_irqrestore(&opl3->voice_lock, flags); 610 } 611 612 static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice) 613 { 614 unsigned short reg_side; 615 unsigned char voice_offset; 616 unsigned short opl3_reg; 617 618 struct snd_opl3_voice *vp, *vp2; 619 620 if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) 621 return; 622 623 vp = &opl3->voices[voice]; 624 if (voice < MAX_OPL2_VOICES) { 625 /* Left register block for voices 0 .. 8 */ 626 reg_side = OPL3_LEFT; 627 voice_offset = voice; 628 } else { 629 /* Right register block for voices 9 .. 17 */ 630 reg_side = OPL3_RIGHT; 631 voice_offset = voice - MAX_OPL2_VOICES; 632 } 633 634 /* kill voice */ 635 #ifdef DEBUG_MIDI 636 snd_printk(KERN_DEBUG " --> kill voice %i\n", voice); 637 #endif 638 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 639 /* clear Key ON bit */ 640 opl3->command(opl3, opl3_reg, vp->keyon_reg); 641 642 /* do the bookkeeping */ 643 vp->time = opl3->use_time++; 644 645 if (vp->state == SNDRV_OPL3_ST_ON_4OP) { 646 vp2 = &opl3->voices[voice + 3]; 647 648 vp2->time = opl3->use_time++; 649 vp2->state = SNDRV_OPL3_ST_OFF; 650 } 651 vp->state = SNDRV_OPL3_ST_OFF; 652 #ifdef DEBUG_ALLOC 653 debug_alloc(opl3, "note off", voice); 654 #endif 655 656 } 657 658 /* 659 * Release a note in response to a midi note off. 660 */ 661 void snd_opl3_note_off(void *p, int note, int vel, struct snd_midi_channel *chan) 662 { 663 struct snd_opl3 *opl3; 664 665 int voice; 666 struct snd_opl3_voice *vp; 667 668 unsigned long flags; 669 670 opl3 = p; 671 672 #ifdef DEBUG_MIDI 673 snd_printk(KERN_DEBUG "Note off, ch %i, inst %i, note %i\n", 674 chan->number, chan->midi_program, note); 675 #endif 676 677 spin_lock_irqsave(&opl3->voice_lock, flags); 678 679 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 680 if (chan->drum_channel && use_internal_drums) { 681 snd_opl3_drum_switch(opl3, note, vel, 0, chan); 682 spin_unlock_irqrestore(&opl3->voice_lock, flags); 683 return; 684 } 685 /* this loop will hopefully kill all extra voices, because 686 they are grouped by the same channel and note values */ 687 for (voice = 0; voice < opl3->max_voices; voice++) { 688 vp = &opl3->voices[voice]; 689 if (vp->state > 0 && vp->chan == chan && vp->note == note) { 690 snd_opl3_kill_voice(opl3, voice); 691 } 692 } 693 } else { 694 /* remap OSS voices */ 695 if (chan->number < MAX_OPL3_VOICES) { 696 voice = snd_opl3_oss_map[chan->number]; 697 snd_opl3_kill_voice(opl3, voice); 698 } 699 } 700 spin_unlock_irqrestore(&opl3->voice_lock, flags); 701 } 702 703 /* 704 * key pressure change 705 */ 706 void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan) 707 { 708 struct snd_opl3 *opl3; 709 710 opl3 = p; 711 #ifdef DEBUG_MIDI 712 snd_printk(KERN_DEBUG "Key pressure, ch#: %i, inst#: %i\n", 713 chan->number, chan->midi_program); 714 #endif 715 } 716 717 /* 718 * terminate note 719 */ 720 void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan) 721 { 722 struct snd_opl3 *opl3; 723 724 opl3 = p; 725 #ifdef DEBUG_MIDI 726 snd_printk(KERN_DEBUG "Terminate note, ch#: %i, inst#: %i\n", 727 chan->number, chan->midi_program); 728 #endif 729 } 730 731 static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice) 732 { 733 unsigned short reg_side; 734 unsigned char voice_offset; 735 unsigned short opl3_reg; 736 737 unsigned char fnum, blocknum; 738 739 struct snd_opl3_voice *vp; 740 741 if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) 742 return; 743 744 vp = &opl3->voices[voice]; 745 if (vp->chan == NULL) 746 return; /* not allocated? */ 747 748 if (voice < MAX_OPL2_VOICES) { 749 /* Left register block for voices 0 .. 8 */ 750 reg_side = OPL3_LEFT; 751 voice_offset = voice; 752 } else { 753 /* Right register block for voices 9 .. 17 */ 754 reg_side = OPL3_RIGHT; 755 voice_offset = voice - MAX_OPL2_VOICES; 756 } 757 758 snd_opl3_calc_pitch(&fnum, &blocknum, vp->note, vp->chan); 759 760 /* Set OPL3 FNUM_LOW register of requested voice */ 761 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); 762 opl3->command(opl3, opl3_reg, fnum); 763 764 vp->keyon_reg = blocknum; 765 766 /* Set output sound flag */ 767 blocknum |= OPL3_KEYON_BIT; 768 769 /* Set OPL3 KEYON_BLOCK register of requested voice */ 770 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 771 opl3->command(opl3, opl3_reg, blocknum); 772 773 vp->time = opl3->use_time++; 774 } 775 776 /* 777 * Update voice pitch controller 778 */ 779 static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan) 780 { 781 int voice; 782 struct snd_opl3_voice *vp; 783 784 unsigned long flags; 785 786 spin_lock_irqsave(&opl3->voice_lock, flags); 787 788 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 789 for (voice = 0; voice < opl3->max_voices; voice++) { 790 vp = &opl3->voices[voice]; 791 if (vp->state > 0 && vp->chan == chan) { 792 snd_opl3_update_pitch(opl3, voice); 793 } 794 } 795 } else { 796 /* remap OSS voices */ 797 if (chan->number < MAX_OPL3_VOICES) { 798 voice = snd_opl3_oss_map[chan->number]; 799 snd_opl3_update_pitch(opl3, voice); 800 } 801 } 802 spin_unlock_irqrestore(&opl3->voice_lock, flags); 803 } 804 805 /* 806 * Deal with a controller type event. This includes all types of 807 * control events, not just the midi controllers 808 */ 809 void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan) 810 { 811 struct snd_opl3 *opl3; 812 813 opl3 = p; 814 #ifdef DEBUG_MIDI 815 snd_printk(KERN_DEBUG "Controller, TYPE = %i, ch#: %i, inst#: %i\n", 816 type, chan->number, chan->midi_program); 817 #endif 818 819 switch (type) { 820 case MIDI_CTL_MSB_MODWHEEL: 821 if (chan->control[MIDI_CTL_MSB_MODWHEEL] > 63) 822 opl3->drum_reg |= OPL3_VIBRATO_DEPTH; 823 else 824 opl3->drum_reg &= ~OPL3_VIBRATO_DEPTH; 825 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 826 opl3->drum_reg); 827 break; 828 case MIDI_CTL_E2_TREMOLO_DEPTH: 829 if (chan->control[MIDI_CTL_E2_TREMOLO_DEPTH] > 63) 830 opl3->drum_reg |= OPL3_TREMOLO_DEPTH; 831 else 832 opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH; 833 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 834 opl3->drum_reg); 835 break; 836 case MIDI_CTL_PITCHBEND: 837 snd_opl3_pitch_ctrl(opl3, chan); 838 break; 839 } 840 } 841 842 /* 843 * NRPN events 844 */ 845 void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan, 846 struct snd_midi_channel_set *chset) 847 { 848 struct snd_opl3 *opl3; 849 850 opl3 = p; 851 #ifdef DEBUG_MIDI 852 snd_printk(KERN_DEBUG "NRPN, ch#: %i, inst#: %i\n", 853 chan->number, chan->midi_program); 854 #endif 855 } 856 857 /* 858 * receive sysex 859 */ 860 void snd_opl3_sysex(void *p, unsigned char *buf, int len, 861 int parsed, struct snd_midi_channel_set *chset) 862 { 863 struct snd_opl3 *opl3; 864 865 opl3 = p; 866 #ifdef DEBUG_MIDI 867 snd_printk(KERN_DEBUG "SYSEX\n"); 868 #endif 869 } 870