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 opl3->tlist.expires = jiffies + 1; /* invoke again */ 263 add_timer(&opl3->tlist); 264 } else { 265 opl3->sys_timer_status = 0; 266 } 267 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); 268 } 269 270 /* 271 * Start system timer 272 */ 273 static void snd_opl3_start_timer(struct snd_opl3 *opl3) 274 { 275 unsigned long flags; 276 spin_lock_irqsave(&opl3->sys_timer_lock, flags); 277 if (! opl3->sys_timer_status) { 278 opl3->tlist.expires = jiffies + 1; 279 add_timer(&opl3->tlist); 280 opl3->sys_timer_status = 1; 281 } 282 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); 283 } 284 285 /* ------------------------------ */ 286 287 288 static int snd_opl3_oss_map[MAX_OPL3_VOICES] = { 289 0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17, 3, 4 ,5, 12, 13, 14 290 }; 291 292 /* 293 * Start a note. 294 */ 295 void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan) 296 { 297 struct snd_opl3 *opl3; 298 int instr_4op; 299 300 int voice; 301 struct snd_opl3_voice *vp, *vp2; 302 unsigned short connect_mask; 303 unsigned char connection; 304 unsigned char vol_op[4]; 305 306 int extra_prg = 0; 307 308 unsigned short reg_side; 309 unsigned char op_offset; 310 unsigned char voice_offset; 311 unsigned short opl3_reg; 312 unsigned char reg_val; 313 unsigned char prg, bank; 314 315 int key = note; 316 unsigned char fnum, blocknum; 317 int i; 318 319 struct fm_patch *patch; 320 struct fm_instrument *fm; 321 unsigned long flags; 322 323 opl3 = p; 324 325 #ifdef DEBUG_MIDI 326 snd_printk(KERN_DEBUG "Note on, ch %i, inst %i, note %i, vel %i\n", 327 chan->number, chan->midi_program, note, vel); 328 #endif 329 330 /* in SYNTH mode, application takes care of voices */ 331 /* in SEQ mode, drum voice numbers are notes on drum channel */ 332 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 333 if (chan->drum_channel) { 334 /* percussion instruments are located in bank 128 */ 335 bank = 128; 336 prg = note; 337 } else { 338 bank = chan->gm_bank_select; 339 prg = chan->midi_program; 340 } 341 } else { 342 /* Prepare for OSS mode */ 343 if (chan->number >= MAX_OPL3_VOICES) 344 return; 345 346 /* OSS instruments are located in bank 127 */ 347 bank = 127; 348 prg = chan->midi_program; 349 } 350 351 spin_lock_irqsave(&opl3->voice_lock, flags); 352 353 if (use_internal_drums) { 354 snd_opl3_drum_switch(opl3, note, vel, 1, chan); 355 spin_unlock_irqrestore(&opl3->voice_lock, flags); 356 return; 357 } 358 359 __extra_prg: 360 patch = snd_opl3_find_patch(opl3, prg, bank, 0); 361 if (!patch) { 362 spin_unlock_irqrestore(&opl3->voice_lock, flags); 363 return; 364 } 365 366 fm = &patch->inst; 367 switch (patch->type) { 368 case FM_PATCH_OPL2: 369 instr_4op = 0; 370 break; 371 case FM_PATCH_OPL3: 372 if (opl3->hardware >= OPL3_HW_OPL3) { 373 instr_4op = 1; 374 break; 375 } 376 default: 377 spin_unlock_irqrestore(&opl3->voice_lock, flags); 378 return; 379 } 380 #ifdef DEBUG_MIDI 381 snd_printk(KERN_DEBUG " --> OPL%i instrument: %s\n", 382 instr_4op ? 3 : 2, patch->name); 383 #endif 384 /* in SYNTH mode, application takes care of voices */ 385 /* in SEQ mode, allocate voice on free OPL3 channel */ 386 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 387 voice = opl3_get_voice(opl3, instr_4op, chan); 388 } else { 389 /* remap OSS voice */ 390 voice = snd_opl3_oss_map[chan->number]; 391 } 392 393 if (voice < 0) { 394 spin_unlock_irqrestore(&opl3->voice_lock, flags); 395 return; 396 } 397 398 if (voice < MAX_OPL2_VOICES) { 399 /* Left register block for voices 0 .. 8 */ 400 reg_side = OPL3_LEFT; 401 voice_offset = voice; 402 connect_mask = (OPL3_LEFT_4OP_0 << voice_offset) & 0x07; 403 } else { 404 /* Right register block for voices 9 .. 17 */ 405 reg_side = OPL3_RIGHT; 406 voice_offset = voice - MAX_OPL2_VOICES; 407 connect_mask = (OPL3_RIGHT_4OP_0 << voice_offset) & 0x38; 408 } 409 410 /* kill voice on channel */ 411 vp = &opl3->voices[voice]; 412 if (vp->state > 0) { 413 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 414 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; 415 opl3->command(opl3, opl3_reg, reg_val); 416 } 417 if (instr_4op) { 418 vp2 = &opl3->voices[voice + 3]; 419 if (vp->state > 0) { 420 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + 421 voice_offset + 3); 422 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; 423 opl3->command(opl3, opl3_reg, reg_val); 424 } 425 } 426 427 /* set connection register */ 428 if (instr_4op) { 429 if ((opl3->connection_reg ^ connect_mask) & connect_mask) { 430 opl3->connection_reg |= connect_mask; 431 /* set connection bit */ 432 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; 433 opl3->command(opl3, opl3_reg, opl3->connection_reg); 434 } 435 } else { 436 if ((opl3->connection_reg ^ ~connect_mask) & connect_mask) { 437 opl3->connection_reg &= ~connect_mask; 438 /* clear connection bit */ 439 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; 440 opl3->command(opl3, opl3_reg, opl3->connection_reg); 441 } 442 } 443 444 #ifdef DEBUG_MIDI 445 snd_printk(KERN_DEBUG " --> setting OPL3 connection: 0x%x\n", 446 opl3->connection_reg); 447 #endif 448 /* 449 * calculate volume depending on connection 450 * between FM operators (see include/opl3.h) 451 */ 452 for (i = 0; i < (instr_4op ? 4 : 2); i++) 453 vol_op[i] = fm->op[i].ksl_level; 454 455 connection = fm->feedback_connection[0] & 0x01; 456 if (instr_4op) { 457 connection <<= 1; 458 connection |= fm->feedback_connection[1] & 0x01; 459 460 snd_opl3_calc_volume(&vol_op[3], vel, chan); 461 switch (connection) { 462 case 0x03: 463 snd_opl3_calc_volume(&vol_op[2], vel, chan); 464 /* fallthru */ 465 case 0x02: 466 snd_opl3_calc_volume(&vol_op[0], vel, chan); 467 break; 468 case 0x01: 469 snd_opl3_calc_volume(&vol_op[1], vel, chan); 470 } 471 } else { 472 snd_opl3_calc_volume(&vol_op[1], vel, chan); 473 if (connection) 474 snd_opl3_calc_volume(&vol_op[0], vel, chan); 475 } 476 477 /* Program the FM voice characteristics */ 478 for (i = 0; i < (instr_4op ? 4 : 2); i++) { 479 #ifdef DEBUG_MIDI 480 snd_printk(KERN_DEBUG " --> programming operator %i\n", i); 481 #endif 482 op_offset = snd_opl3_regmap[voice_offset][i]; 483 484 /* Set OPL3 AM_VIB register of requested voice/operator */ 485 reg_val = fm->op[i].am_vib; 486 opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset); 487 opl3->command(opl3, opl3_reg, reg_val); 488 489 /* Set OPL3 KSL_LEVEL register of requested voice/operator */ 490 reg_val = vol_op[i]; 491 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset); 492 opl3->command(opl3, opl3_reg, reg_val); 493 494 /* Set OPL3 ATTACK_DECAY register of requested voice/operator */ 495 reg_val = fm->op[i].attack_decay; 496 opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset); 497 opl3->command(opl3, opl3_reg, reg_val); 498 499 /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */ 500 reg_val = fm->op[i].sustain_release; 501 opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset); 502 opl3->command(opl3, opl3_reg, reg_val); 503 504 /* Select waveform */ 505 reg_val = fm->op[i].wave_select; 506 opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset); 507 opl3->command(opl3, opl3_reg, reg_val); 508 } 509 510 /* Set operator feedback and 2op inter-operator connection */ 511 reg_val = fm->feedback_connection[0]; 512 /* Set output voice connection */ 513 reg_val |= OPL3_STEREO_BITS; 514 if (chan->gm_pan < 43) 515 reg_val &= ~OPL3_VOICE_TO_RIGHT; 516 if (chan->gm_pan > 85) 517 reg_val &= ~OPL3_VOICE_TO_LEFT; 518 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset); 519 opl3->command(opl3, opl3_reg, reg_val); 520 521 if (instr_4op) { 522 /* Set 4op inter-operator connection */ 523 reg_val = fm->feedback_connection[1] & OPL3_CONNECTION_BIT; 524 /* Set output voice connection */ 525 reg_val |= OPL3_STEREO_BITS; 526 if (chan->gm_pan < 43) 527 reg_val &= ~OPL3_VOICE_TO_RIGHT; 528 if (chan->gm_pan > 85) 529 reg_val &= ~OPL3_VOICE_TO_LEFT; 530 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + 531 voice_offset + 3); 532 opl3->command(opl3, opl3_reg, reg_val); 533 } 534 535 /* 536 * Special treatment of percussion notes for fm: 537 * Requested pitch is really program, and pitch for 538 * device is whatever was specified in the patch library. 539 */ 540 if (fm->fix_key) 541 note = fm->fix_key; 542 /* 543 * use transpose if defined in patch library 544 */ 545 if (fm->trnsps) 546 note += (fm->trnsps - 64); 547 548 snd_opl3_calc_pitch(&fnum, &blocknum, note, chan); 549 550 /* Set OPL3 FNUM_LOW register of requested voice */ 551 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); 552 opl3->command(opl3, opl3_reg, fnum); 553 554 opl3->voices[voice].keyon_reg = blocknum; 555 556 /* Set output sound flag */ 557 blocknum |= OPL3_KEYON_BIT; 558 559 #ifdef DEBUG_MIDI 560 snd_printk(KERN_DEBUG " --> trigger voice %i\n", voice); 561 #endif 562 /* Set OPL3 KEYON_BLOCK register of requested voice */ 563 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 564 opl3->command(opl3, opl3_reg, blocknum); 565 566 /* kill note after fixed duration (in centiseconds) */ 567 if (fm->fix_dur) { 568 opl3->voices[voice].note_off = jiffies + 569 (fm->fix_dur * HZ) / 100; 570 snd_opl3_start_timer(opl3); 571 opl3->voices[voice].note_off_check = 1; 572 } else 573 opl3->voices[voice].note_off_check = 0; 574 575 /* get extra pgm, but avoid possible loops */ 576 extra_prg = (extra_prg) ? 0 : fm->modes; 577 578 /* do the bookkeeping */ 579 vp->time = opl3->use_time++; 580 vp->note = key; 581 vp->chan = chan; 582 583 if (instr_4op) { 584 vp->state = SNDRV_OPL3_ST_ON_4OP; 585 586 vp2 = &opl3->voices[voice + 3]; 587 vp2->time = opl3->use_time++; 588 vp2->note = key; 589 vp2->chan = chan; 590 vp2->state = SNDRV_OPL3_ST_NOT_AVAIL; 591 } else { 592 if (vp->state == SNDRV_OPL3_ST_ON_4OP) { 593 /* 4op killed by 2op, release bounded voice */ 594 vp2 = &opl3->voices[voice + 3]; 595 vp2->time = opl3->use_time++; 596 vp2->state = SNDRV_OPL3_ST_OFF; 597 } 598 vp->state = SNDRV_OPL3_ST_ON_2OP; 599 } 600 601 #ifdef DEBUG_ALLOC 602 debug_alloc(opl3, "note on ", voice); 603 #endif 604 605 /* allocate extra program if specified in patch library */ 606 if (extra_prg) { 607 if (extra_prg > 128) { 608 bank = 128; 609 /* percussions start at 35 */ 610 prg = extra_prg - 128 + 35 - 1; 611 } else { 612 bank = 0; 613 prg = extra_prg - 1; 614 } 615 #ifdef DEBUG_MIDI 616 snd_printk(KERN_DEBUG " *** allocating extra program\n"); 617 #endif 618 goto __extra_prg; 619 } 620 spin_unlock_irqrestore(&opl3->voice_lock, flags); 621 } 622 623 static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice) 624 { 625 unsigned short reg_side; 626 unsigned char voice_offset; 627 unsigned short opl3_reg; 628 629 struct snd_opl3_voice *vp, *vp2; 630 631 if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) 632 return; 633 634 vp = &opl3->voices[voice]; 635 if (voice < MAX_OPL2_VOICES) { 636 /* Left register block for voices 0 .. 8 */ 637 reg_side = OPL3_LEFT; 638 voice_offset = voice; 639 } else { 640 /* Right register block for voices 9 .. 17 */ 641 reg_side = OPL3_RIGHT; 642 voice_offset = voice - MAX_OPL2_VOICES; 643 } 644 645 /* kill voice */ 646 #ifdef DEBUG_MIDI 647 snd_printk(KERN_DEBUG " --> kill voice %i\n", voice); 648 #endif 649 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 650 /* clear Key ON bit */ 651 opl3->command(opl3, opl3_reg, vp->keyon_reg); 652 653 /* do the bookkeeping */ 654 vp->time = opl3->use_time++; 655 656 if (vp->state == SNDRV_OPL3_ST_ON_4OP) { 657 vp2 = &opl3->voices[voice + 3]; 658 659 vp2->time = opl3->use_time++; 660 vp2->state = SNDRV_OPL3_ST_OFF; 661 } 662 vp->state = SNDRV_OPL3_ST_OFF; 663 #ifdef DEBUG_ALLOC 664 debug_alloc(opl3, "note off", voice); 665 #endif 666 667 } 668 669 /* 670 * Release a note in response to a midi note off. 671 */ 672 static void snd_opl3_note_off_unsafe(void *p, int note, int vel, 673 struct snd_midi_channel *chan) 674 { 675 struct snd_opl3 *opl3; 676 677 int voice; 678 struct snd_opl3_voice *vp; 679 680 opl3 = p; 681 682 #ifdef DEBUG_MIDI 683 snd_printk(KERN_DEBUG "Note off, ch %i, inst %i, note %i\n", 684 chan->number, chan->midi_program, note); 685 #endif 686 687 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 688 if (chan->drum_channel && use_internal_drums) { 689 snd_opl3_drum_switch(opl3, note, vel, 0, chan); 690 return; 691 } 692 /* this loop will hopefully kill all extra voices, because 693 they are grouped by the same channel and note values */ 694 for (voice = 0; voice < opl3->max_voices; voice++) { 695 vp = &opl3->voices[voice]; 696 if (vp->state > 0 && vp->chan == chan && vp->note == note) { 697 snd_opl3_kill_voice(opl3, voice); 698 } 699 } 700 } else { 701 /* remap OSS voices */ 702 if (chan->number < MAX_OPL3_VOICES) { 703 voice = snd_opl3_oss_map[chan->number]; 704 snd_opl3_kill_voice(opl3, voice); 705 } 706 } 707 } 708 709 void snd_opl3_note_off(void *p, int note, int vel, 710 struct snd_midi_channel *chan) 711 { 712 struct snd_opl3 *opl3 = p; 713 unsigned long flags; 714 715 spin_lock_irqsave(&opl3->voice_lock, flags); 716 snd_opl3_note_off_unsafe(p, note, vel, chan); 717 spin_unlock_irqrestore(&opl3->voice_lock, flags); 718 } 719 720 /* 721 * key pressure change 722 */ 723 void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan) 724 { 725 struct snd_opl3 *opl3; 726 727 opl3 = p; 728 #ifdef DEBUG_MIDI 729 snd_printk(KERN_DEBUG "Key pressure, ch#: %i, inst#: %i\n", 730 chan->number, chan->midi_program); 731 #endif 732 } 733 734 /* 735 * terminate note 736 */ 737 void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan) 738 { 739 struct snd_opl3 *opl3; 740 741 opl3 = p; 742 #ifdef DEBUG_MIDI 743 snd_printk(KERN_DEBUG "Terminate note, ch#: %i, inst#: %i\n", 744 chan->number, chan->midi_program); 745 #endif 746 } 747 748 static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice) 749 { 750 unsigned short reg_side; 751 unsigned char voice_offset; 752 unsigned short opl3_reg; 753 754 unsigned char fnum, blocknum; 755 756 struct snd_opl3_voice *vp; 757 758 if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) 759 return; 760 761 vp = &opl3->voices[voice]; 762 if (vp->chan == NULL) 763 return; /* not allocated? */ 764 765 if (voice < MAX_OPL2_VOICES) { 766 /* Left register block for voices 0 .. 8 */ 767 reg_side = OPL3_LEFT; 768 voice_offset = voice; 769 } else { 770 /* Right register block for voices 9 .. 17 */ 771 reg_side = OPL3_RIGHT; 772 voice_offset = voice - MAX_OPL2_VOICES; 773 } 774 775 snd_opl3_calc_pitch(&fnum, &blocknum, vp->note, vp->chan); 776 777 /* Set OPL3 FNUM_LOW register of requested voice */ 778 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); 779 opl3->command(opl3, opl3_reg, fnum); 780 781 vp->keyon_reg = blocknum; 782 783 /* Set output sound flag */ 784 blocknum |= OPL3_KEYON_BIT; 785 786 /* Set OPL3 KEYON_BLOCK register of requested voice */ 787 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 788 opl3->command(opl3, opl3_reg, blocknum); 789 790 vp->time = opl3->use_time++; 791 } 792 793 /* 794 * Update voice pitch controller 795 */ 796 static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan) 797 { 798 int voice; 799 struct snd_opl3_voice *vp; 800 801 unsigned long flags; 802 803 spin_lock_irqsave(&opl3->voice_lock, flags); 804 805 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 806 for (voice = 0; voice < opl3->max_voices; voice++) { 807 vp = &opl3->voices[voice]; 808 if (vp->state > 0 && vp->chan == chan) { 809 snd_opl3_update_pitch(opl3, voice); 810 } 811 } 812 } else { 813 /* remap OSS voices */ 814 if (chan->number < MAX_OPL3_VOICES) { 815 voice = snd_opl3_oss_map[chan->number]; 816 snd_opl3_update_pitch(opl3, voice); 817 } 818 } 819 spin_unlock_irqrestore(&opl3->voice_lock, flags); 820 } 821 822 /* 823 * Deal with a controller type event. This includes all types of 824 * control events, not just the midi controllers 825 */ 826 void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan) 827 { 828 struct snd_opl3 *opl3; 829 830 opl3 = p; 831 #ifdef DEBUG_MIDI 832 snd_printk(KERN_DEBUG "Controller, TYPE = %i, ch#: %i, inst#: %i\n", 833 type, chan->number, chan->midi_program); 834 #endif 835 836 switch (type) { 837 case MIDI_CTL_MSB_MODWHEEL: 838 if (chan->control[MIDI_CTL_MSB_MODWHEEL] > 63) 839 opl3->drum_reg |= OPL3_VIBRATO_DEPTH; 840 else 841 opl3->drum_reg &= ~OPL3_VIBRATO_DEPTH; 842 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 843 opl3->drum_reg); 844 break; 845 case MIDI_CTL_E2_TREMOLO_DEPTH: 846 if (chan->control[MIDI_CTL_E2_TREMOLO_DEPTH] > 63) 847 opl3->drum_reg |= OPL3_TREMOLO_DEPTH; 848 else 849 opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH; 850 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 851 opl3->drum_reg); 852 break; 853 case MIDI_CTL_PITCHBEND: 854 snd_opl3_pitch_ctrl(opl3, chan); 855 break; 856 } 857 } 858 859 /* 860 * NRPN events 861 */ 862 void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan, 863 struct snd_midi_channel_set *chset) 864 { 865 struct snd_opl3 *opl3; 866 867 opl3 = p; 868 #ifdef DEBUG_MIDI 869 snd_printk(KERN_DEBUG "NRPN, ch#: %i, inst#: %i\n", 870 chan->number, chan->midi_program); 871 #endif 872 } 873 874 /* 875 * receive sysex 876 */ 877 void snd_opl3_sysex(void *p, unsigned char *buf, int len, 878 int parsed, struct snd_midi_channel_set *chset) 879 { 880 struct snd_opl3 *opl3; 881 882 opl3 = p; 883 #ifdef DEBUG_MIDI 884 snd_printk(KERN_DEBUG "SYSEX\n"); 885 #endif 886 } 887