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 static void snd_opl3_note_off_unsafe(void *p, int note, int vel, 29 struct snd_midi_channel *chan); 30 /* 31 * The next table looks magical, but it certainly is not. Its values have 32 * been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception 33 * for i=0. This log-table converts a linear volume-scaling (0..127) to a 34 * logarithmic scaling as present in the FM-synthesizer chips. so : Volume 35 * 64 = 0 db = relative volume 0 and: Volume 32 = -6 db = relative 36 * volume -8 it was implemented as a table because it is only 128 bytes and 37 * it saves a lot of log() calculations. (Rob Hooft <hooft@chem.ruu.nl>) 38 */ 39 40 static char opl3_volume_table[128] = 41 { 42 -63, -48, -40, -35, -32, -29, -27, -26, 43 -24, -23, -21, -20, -19, -18, -18, -17, 44 -16, -15, -15, -14, -13, -13, -12, -12, 45 -11, -11, -10, -10, -10, -9, -9, -8, 46 -8, -8, -7, -7, -7, -6, -6, -6, 47 -5, -5, -5, -5, -4, -4, -4, -4, 48 -3, -3, -3, -3, -2, -2, -2, -2, 49 -2, -1, -1, -1, -1, 0, 0, 0, 50 0, 0, 0, 1, 1, 1, 1, 1, 51 1, 2, 2, 2, 2, 2, 2, 2, 52 3, 3, 3, 3, 3, 3, 3, 4, 53 4, 4, 4, 4, 4, 4, 4, 5, 54 5, 5, 5, 5, 5, 5, 5, 5, 55 6, 6, 6, 6, 6, 6, 6, 6, 56 6, 7, 7, 7, 7, 7, 7, 7, 57 7, 7, 7, 8, 8, 8, 8, 8 58 }; 59 60 void snd_opl3_calc_volume(unsigned char *volbyte, int vel, 61 struct snd_midi_channel *chan) 62 { 63 int oldvol, newvol, n; 64 int volume; 65 66 volume = (vel * chan->gm_volume * chan->gm_expression) / (127*127); 67 if (volume > 127) 68 volume = 127; 69 70 oldvol = OPL3_TOTAL_LEVEL_MASK - (*volbyte & OPL3_TOTAL_LEVEL_MASK); 71 72 newvol = opl3_volume_table[volume] + oldvol; 73 if (newvol > OPL3_TOTAL_LEVEL_MASK) 74 newvol = OPL3_TOTAL_LEVEL_MASK; 75 else if (newvol < 0) 76 newvol = 0; 77 78 n = OPL3_TOTAL_LEVEL_MASK - (newvol & OPL3_TOTAL_LEVEL_MASK); 79 80 *volbyte = (*volbyte & OPL3_KSL_MASK) | (n & OPL3_TOTAL_LEVEL_MASK); 81 } 82 83 /* 84 * Converts the note frequency to block and fnum values for the FM chip 85 */ 86 static short opl3_note_table[16] = 87 { 88 305, 323, /* for pitch bending, -2 semitones */ 89 343, 363, 385, 408, 432, 458, 485, 514, 544, 577, 611, 647, 90 686, 726 /* for pitch bending, +2 semitones */ 91 }; 92 93 static void snd_opl3_calc_pitch(unsigned char *fnum, unsigned char *blocknum, 94 int note, struct snd_midi_channel *chan) 95 { 96 int block = ((note / 12) & 0x07) - 1; 97 int idx = (note % 12) + 2; 98 int freq; 99 100 if (chan->midi_pitchbend) { 101 int pitchbend = chan->midi_pitchbend; 102 int segment; 103 104 if (pitchbend < -0x2000) 105 pitchbend = -0x2000; 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(KERN_CONT "%c", *(str + opl3->voices[i].state + 1)); 131 printk(KERN_CONT "\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(struct timer_list *t) 238 { 239 240 struct snd_opl3 *opl3 = from_timer(opl3, t, tlist); 241 unsigned long flags; 242 int again = 0; 243 int i; 244 245 spin_lock_irqsave(&opl3->voice_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_unsafe(opl3, vp->note, 0, 251 vp->chan); 252 else 253 again++; 254 } 255 } 256 spin_unlock_irqrestore(&opl3->voice_lock, flags); 257 258 spin_lock_irqsave(&opl3->sys_timer_lock, flags); 259 if (again) 260 mod_timer(&opl3->tlist, jiffies + 1); /* invoke again */ 261 else 262 opl3->sys_timer_status = 0; 263 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); 264 } 265 266 /* 267 * Start system timer 268 */ 269 static void snd_opl3_start_timer(struct snd_opl3 *opl3) 270 { 271 unsigned long flags; 272 spin_lock_irqsave(&opl3->sys_timer_lock, flags); 273 if (! opl3->sys_timer_status) { 274 mod_timer(&opl3->tlist, jiffies + 1); 275 opl3->sys_timer_status = 1; 276 } 277 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); 278 } 279 280 /* ------------------------------ */ 281 282 283 static int snd_opl3_oss_map[MAX_OPL3_VOICES] = { 284 0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17, 3, 4 ,5, 12, 13, 14 285 }; 286 287 /* 288 * Start a note. 289 */ 290 void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan) 291 { 292 struct snd_opl3 *opl3; 293 int instr_4op; 294 295 int voice; 296 struct snd_opl3_voice *vp, *vp2; 297 unsigned short connect_mask; 298 unsigned char connection; 299 unsigned char vol_op[4]; 300 301 int extra_prg = 0; 302 303 unsigned short reg_side; 304 unsigned char op_offset; 305 unsigned char voice_offset; 306 unsigned short opl3_reg; 307 unsigned char reg_val; 308 unsigned char prg, bank; 309 310 int key = note; 311 unsigned char fnum, blocknum; 312 int i; 313 314 struct fm_patch *patch; 315 struct fm_instrument *fm; 316 unsigned long flags; 317 318 opl3 = p; 319 320 #ifdef DEBUG_MIDI 321 snd_printk(KERN_DEBUG "Note on, ch %i, inst %i, note %i, vel %i\n", 322 chan->number, chan->midi_program, note, vel); 323 #endif 324 325 /* in SYNTH mode, application takes care of voices */ 326 /* in SEQ mode, drum voice numbers are notes on drum channel */ 327 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 328 if (chan->drum_channel) { 329 /* percussion instruments are located in bank 128 */ 330 bank = 128; 331 prg = note; 332 } else { 333 bank = chan->gm_bank_select; 334 prg = chan->midi_program; 335 } 336 } else { 337 /* Prepare for OSS mode */ 338 if (chan->number >= MAX_OPL3_VOICES) 339 return; 340 341 /* OSS instruments are located in bank 127 */ 342 bank = 127; 343 prg = chan->midi_program; 344 } 345 346 spin_lock_irqsave(&opl3->voice_lock, flags); 347 348 if (use_internal_drums) { 349 snd_opl3_drum_switch(opl3, note, vel, 1, chan); 350 spin_unlock_irqrestore(&opl3->voice_lock, flags); 351 return; 352 } 353 354 __extra_prg: 355 patch = snd_opl3_find_patch(opl3, prg, bank, 0); 356 if (!patch) { 357 spin_unlock_irqrestore(&opl3->voice_lock, flags); 358 return; 359 } 360 361 fm = &patch->inst; 362 switch (patch->type) { 363 case FM_PATCH_OPL2: 364 instr_4op = 0; 365 break; 366 case FM_PATCH_OPL3: 367 if (opl3->hardware >= OPL3_HW_OPL3) { 368 instr_4op = 1; 369 break; 370 } 371 /* fall through */ 372 default: 373 spin_unlock_irqrestore(&opl3->voice_lock, flags); 374 return; 375 } 376 #ifdef DEBUG_MIDI 377 snd_printk(KERN_DEBUG " --> OPL%i instrument: %s\n", 378 instr_4op ? 3 : 2, patch->name); 379 #endif 380 /* in SYNTH mode, application takes care of voices */ 381 /* in SEQ mode, allocate voice on free OPL3 channel */ 382 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 383 voice = opl3_get_voice(opl3, instr_4op, chan); 384 } else { 385 /* remap OSS voice */ 386 voice = snd_opl3_oss_map[chan->number]; 387 } 388 389 if (voice < 0) { 390 spin_unlock_irqrestore(&opl3->voice_lock, flags); 391 return; 392 } 393 394 if (voice < MAX_OPL2_VOICES) { 395 /* Left register block for voices 0 .. 8 */ 396 reg_side = OPL3_LEFT; 397 voice_offset = voice; 398 connect_mask = (OPL3_LEFT_4OP_0 << voice_offset) & 0x07; 399 } else { 400 /* Right register block for voices 9 .. 17 */ 401 reg_side = OPL3_RIGHT; 402 voice_offset = voice - MAX_OPL2_VOICES; 403 connect_mask = (OPL3_RIGHT_4OP_0 << voice_offset) & 0x38; 404 } 405 406 /* kill voice on channel */ 407 vp = &opl3->voices[voice]; 408 if (vp->state > 0) { 409 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 410 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; 411 opl3->command(opl3, opl3_reg, reg_val); 412 } 413 if (instr_4op) { 414 vp2 = &opl3->voices[voice + 3]; 415 if (vp->state > 0) { 416 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + 417 voice_offset + 3); 418 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; 419 opl3->command(opl3, opl3_reg, reg_val); 420 } 421 } 422 423 /* set connection register */ 424 if (instr_4op) { 425 if ((opl3->connection_reg ^ connect_mask) & connect_mask) { 426 opl3->connection_reg |= connect_mask; 427 /* set connection bit */ 428 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; 429 opl3->command(opl3, opl3_reg, opl3->connection_reg); 430 } 431 } else { 432 if ((opl3->connection_reg ^ ~connect_mask) & connect_mask) { 433 opl3->connection_reg &= ~connect_mask; 434 /* clear connection bit */ 435 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; 436 opl3->command(opl3, opl3_reg, opl3->connection_reg); 437 } 438 } 439 440 #ifdef DEBUG_MIDI 441 snd_printk(KERN_DEBUG " --> setting OPL3 connection: 0x%x\n", 442 opl3->connection_reg); 443 #endif 444 /* 445 * calculate volume depending on connection 446 * between FM operators (see include/opl3.h) 447 */ 448 for (i = 0; i < (instr_4op ? 4 : 2); i++) 449 vol_op[i] = fm->op[i].ksl_level; 450 451 connection = fm->feedback_connection[0] & 0x01; 452 if (instr_4op) { 453 connection <<= 1; 454 connection |= fm->feedback_connection[1] & 0x01; 455 456 snd_opl3_calc_volume(&vol_op[3], vel, chan); 457 switch (connection) { 458 case 0x03: 459 snd_opl3_calc_volume(&vol_op[2], vel, chan); 460 /* fallthru */ 461 case 0x02: 462 snd_opl3_calc_volume(&vol_op[0], vel, chan); 463 break; 464 case 0x01: 465 snd_opl3_calc_volume(&vol_op[1], vel, chan); 466 } 467 } else { 468 snd_opl3_calc_volume(&vol_op[1], vel, chan); 469 if (connection) 470 snd_opl3_calc_volume(&vol_op[0], vel, chan); 471 } 472 473 /* Program the FM voice characteristics */ 474 for (i = 0; i < (instr_4op ? 4 : 2); i++) { 475 #ifdef DEBUG_MIDI 476 snd_printk(KERN_DEBUG " --> programming operator %i\n", i); 477 #endif 478 op_offset = snd_opl3_regmap[voice_offset][i]; 479 480 /* Set OPL3 AM_VIB register of requested voice/operator */ 481 reg_val = fm->op[i].am_vib; 482 opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset); 483 opl3->command(opl3, opl3_reg, reg_val); 484 485 /* Set OPL3 KSL_LEVEL register of requested voice/operator */ 486 reg_val = vol_op[i]; 487 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset); 488 opl3->command(opl3, opl3_reg, reg_val); 489 490 /* Set OPL3 ATTACK_DECAY register of requested voice/operator */ 491 reg_val = fm->op[i].attack_decay; 492 opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset); 493 opl3->command(opl3, opl3_reg, reg_val); 494 495 /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */ 496 reg_val = fm->op[i].sustain_release; 497 opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset); 498 opl3->command(opl3, opl3_reg, reg_val); 499 500 /* Select waveform */ 501 reg_val = fm->op[i].wave_select; 502 opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset); 503 opl3->command(opl3, opl3_reg, reg_val); 504 } 505 506 /* Set operator feedback and 2op inter-operator connection */ 507 reg_val = fm->feedback_connection[0]; 508 /* Set output voice connection */ 509 reg_val |= OPL3_STEREO_BITS; 510 if (chan->gm_pan < 43) 511 reg_val &= ~OPL3_VOICE_TO_RIGHT; 512 if (chan->gm_pan > 85) 513 reg_val &= ~OPL3_VOICE_TO_LEFT; 514 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset); 515 opl3->command(opl3, opl3_reg, reg_val); 516 517 if (instr_4op) { 518 /* Set 4op inter-operator connection */ 519 reg_val = fm->feedback_connection[1] & OPL3_CONNECTION_BIT; 520 /* Set output voice connection */ 521 reg_val |= OPL3_STEREO_BITS; 522 if (chan->gm_pan < 43) 523 reg_val &= ~OPL3_VOICE_TO_RIGHT; 524 if (chan->gm_pan > 85) 525 reg_val &= ~OPL3_VOICE_TO_LEFT; 526 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + 527 voice_offset + 3); 528 opl3->command(opl3, opl3_reg, reg_val); 529 } 530 531 /* 532 * Special treatment of percussion notes for fm: 533 * Requested pitch is really program, and pitch for 534 * device is whatever was specified in the patch library. 535 */ 536 if (fm->fix_key) 537 note = fm->fix_key; 538 /* 539 * use transpose if defined in patch library 540 */ 541 if (fm->trnsps) 542 note += (fm->trnsps - 64); 543 544 snd_opl3_calc_pitch(&fnum, &blocknum, note, chan); 545 546 /* Set OPL3 FNUM_LOW register of requested voice */ 547 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); 548 opl3->command(opl3, opl3_reg, fnum); 549 550 opl3->voices[voice].keyon_reg = blocknum; 551 552 /* Set output sound flag */ 553 blocknum |= OPL3_KEYON_BIT; 554 555 #ifdef DEBUG_MIDI 556 snd_printk(KERN_DEBUG " --> trigger voice %i\n", voice); 557 #endif 558 /* Set OPL3 KEYON_BLOCK register of requested voice */ 559 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 560 opl3->command(opl3, opl3_reg, blocknum); 561 562 /* kill note after fixed duration (in centiseconds) */ 563 if (fm->fix_dur) { 564 opl3->voices[voice].note_off = jiffies + 565 (fm->fix_dur * HZ) / 100; 566 snd_opl3_start_timer(opl3); 567 opl3->voices[voice].note_off_check = 1; 568 } else 569 opl3->voices[voice].note_off_check = 0; 570 571 /* get extra pgm, but avoid possible loops */ 572 extra_prg = (extra_prg) ? 0 : fm->modes; 573 574 /* do the bookkeeping */ 575 vp->time = opl3->use_time++; 576 vp->note = key; 577 vp->chan = chan; 578 579 if (instr_4op) { 580 vp->state = SNDRV_OPL3_ST_ON_4OP; 581 582 vp2 = &opl3->voices[voice + 3]; 583 vp2->time = opl3->use_time++; 584 vp2->note = key; 585 vp2->chan = chan; 586 vp2->state = SNDRV_OPL3_ST_NOT_AVAIL; 587 } else { 588 if (vp->state == SNDRV_OPL3_ST_ON_4OP) { 589 /* 4op killed by 2op, release bounded voice */ 590 vp2 = &opl3->voices[voice + 3]; 591 vp2->time = opl3->use_time++; 592 vp2->state = SNDRV_OPL3_ST_OFF; 593 } 594 vp->state = SNDRV_OPL3_ST_ON_2OP; 595 } 596 597 #ifdef DEBUG_ALLOC 598 debug_alloc(opl3, "note on ", voice); 599 #endif 600 601 /* allocate extra program if specified in patch library */ 602 if (extra_prg) { 603 if (extra_prg > 128) { 604 bank = 128; 605 /* percussions start at 35 */ 606 prg = extra_prg - 128 + 35 - 1; 607 } else { 608 bank = 0; 609 prg = extra_prg - 1; 610 } 611 #ifdef DEBUG_MIDI 612 snd_printk(KERN_DEBUG " *** allocating extra program\n"); 613 #endif 614 goto __extra_prg; 615 } 616 spin_unlock_irqrestore(&opl3->voice_lock, flags); 617 } 618 619 static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice) 620 { 621 unsigned short reg_side; 622 unsigned char voice_offset; 623 unsigned short opl3_reg; 624 625 struct snd_opl3_voice *vp, *vp2; 626 627 if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) 628 return; 629 630 vp = &opl3->voices[voice]; 631 if (voice < MAX_OPL2_VOICES) { 632 /* Left register block for voices 0 .. 8 */ 633 reg_side = OPL3_LEFT; 634 voice_offset = voice; 635 } else { 636 /* Right register block for voices 9 .. 17 */ 637 reg_side = OPL3_RIGHT; 638 voice_offset = voice - MAX_OPL2_VOICES; 639 } 640 641 /* kill voice */ 642 #ifdef DEBUG_MIDI 643 snd_printk(KERN_DEBUG " --> kill voice %i\n", voice); 644 #endif 645 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 646 /* clear Key ON bit */ 647 opl3->command(opl3, opl3_reg, vp->keyon_reg); 648 649 /* do the bookkeeping */ 650 vp->time = opl3->use_time++; 651 652 if (vp->state == SNDRV_OPL3_ST_ON_4OP) { 653 vp2 = &opl3->voices[voice + 3]; 654 655 vp2->time = opl3->use_time++; 656 vp2->state = SNDRV_OPL3_ST_OFF; 657 } 658 vp->state = SNDRV_OPL3_ST_OFF; 659 #ifdef DEBUG_ALLOC 660 debug_alloc(opl3, "note off", voice); 661 #endif 662 663 } 664 665 /* 666 * Release a note in response to a midi note off. 667 */ 668 static void snd_opl3_note_off_unsafe(void *p, int note, int vel, 669 struct snd_midi_channel *chan) 670 { 671 struct snd_opl3 *opl3; 672 673 int voice; 674 struct snd_opl3_voice *vp; 675 676 opl3 = p; 677 678 #ifdef DEBUG_MIDI 679 snd_printk(KERN_DEBUG "Note off, ch %i, inst %i, note %i\n", 680 chan->number, chan->midi_program, note); 681 #endif 682 683 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 684 if (chan->drum_channel && use_internal_drums) { 685 snd_opl3_drum_switch(opl3, note, vel, 0, chan); 686 return; 687 } 688 /* this loop will hopefully kill all extra voices, because 689 they are grouped by the same channel and note values */ 690 for (voice = 0; voice < opl3->max_voices; voice++) { 691 vp = &opl3->voices[voice]; 692 if (vp->state > 0 && vp->chan == chan && vp->note == note) { 693 snd_opl3_kill_voice(opl3, voice); 694 } 695 } 696 } else { 697 /* remap OSS voices */ 698 if (chan->number < MAX_OPL3_VOICES) { 699 voice = snd_opl3_oss_map[chan->number]; 700 snd_opl3_kill_voice(opl3, voice); 701 } 702 } 703 } 704 705 void snd_opl3_note_off(void *p, int note, int vel, 706 struct snd_midi_channel *chan) 707 { 708 struct snd_opl3 *opl3 = p; 709 unsigned long flags; 710 711 spin_lock_irqsave(&opl3->voice_lock, flags); 712 snd_opl3_note_off_unsafe(p, note, vel, chan); 713 spin_unlock_irqrestore(&opl3->voice_lock, flags); 714 } 715 716 /* 717 * key pressure change 718 */ 719 void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan) 720 { 721 #ifdef DEBUG_MIDI 722 snd_printk(KERN_DEBUG "Key pressure, ch#: %i, inst#: %i\n", 723 chan->number, chan->midi_program); 724 #endif 725 } 726 727 /* 728 * terminate note 729 */ 730 void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan) 731 { 732 #ifdef DEBUG_MIDI 733 snd_printk(KERN_DEBUG "Terminate note, ch#: %i, inst#: %i\n", 734 chan->number, chan->midi_program); 735 #endif 736 } 737 738 static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice) 739 { 740 unsigned short reg_side; 741 unsigned char voice_offset; 742 unsigned short opl3_reg; 743 744 unsigned char fnum, blocknum; 745 746 struct snd_opl3_voice *vp; 747 748 if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) 749 return; 750 751 vp = &opl3->voices[voice]; 752 if (vp->chan == NULL) 753 return; /* not allocated? */ 754 755 if (voice < MAX_OPL2_VOICES) { 756 /* Left register block for voices 0 .. 8 */ 757 reg_side = OPL3_LEFT; 758 voice_offset = voice; 759 } else { 760 /* Right register block for voices 9 .. 17 */ 761 reg_side = OPL3_RIGHT; 762 voice_offset = voice - MAX_OPL2_VOICES; 763 } 764 765 snd_opl3_calc_pitch(&fnum, &blocknum, vp->note, vp->chan); 766 767 /* Set OPL3 FNUM_LOW register of requested voice */ 768 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); 769 opl3->command(opl3, opl3_reg, fnum); 770 771 vp->keyon_reg = blocknum; 772 773 /* Set output sound flag */ 774 blocknum |= OPL3_KEYON_BIT; 775 776 /* Set OPL3 KEYON_BLOCK register of requested voice */ 777 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 778 opl3->command(opl3, opl3_reg, blocknum); 779 780 vp->time = opl3->use_time++; 781 } 782 783 /* 784 * Update voice pitch controller 785 */ 786 static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan) 787 { 788 int voice; 789 struct snd_opl3_voice *vp; 790 791 unsigned long flags; 792 793 spin_lock_irqsave(&opl3->voice_lock, flags); 794 795 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 796 for (voice = 0; voice < opl3->max_voices; voice++) { 797 vp = &opl3->voices[voice]; 798 if (vp->state > 0 && vp->chan == chan) { 799 snd_opl3_update_pitch(opl3, voice); 800 } 801 } 802 } else { 803 /* remap OSS voices */ 804 if (chan->number < MAX_OPL3_VOICES) { 805 voice = snd_opl3_oss_map[chan->number]; 806 snd_opl3_update_pitch(opl3, voice); 807 } 808 } 809 spin_unlock_irqrestore(&opl3->voice_lock, flags); 810 } 811 812 /* 813 * Deal with a controller type event. This includes all types of 814 * control events, not just the midi controllers 815 */ 816 void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan) 817 { 818 struct snd_opl3 *opl3; 819 820 opl3 = p; 821 #ifdef DEBUG_MIDI 822 snd_printk(KERN_DEBUG "Controller, TYPE = %i, ch#: %i, inst#: %i\n", 823 type, chan->number, chan->midi_program); 824 #endif 825 826 switch (type) { 827 case MIDI_CTL_MSB_MODWHEEL: 828 if (chan->control[MIDI_CTL_MSB_MODWHEEL] > 63) 829 opl3->drum_reg |= OPL3_VIBRATO_DEPTH; 830 else 831 opl3->drum_reg &= ~OPL3_VIBRATO_DEPTH; 832 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 833 opl3->drum_reg); 834 break; 835 case MIDI_CTL_E2_TREMOLO_DEPTH: 836 if (chan->control[MIDI_CTL_E2_TREMOLO_DEPTH] > 63) 837 opl3->drum_reg |= OPL3_TREMOLO_DEPTH; 838 else 839 opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH; 840 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 841 opl3->drum_reg); 842 break; 843 case MIDI_CTL_PITCHBEND: 844 snd_opl3_pitch_ctrl(opl3, chan); 845 break; 846 } 847 } 848 849 /* 850 * NRPN events 851 */ 852 void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan, 853 struct snd_midi_channel_set *chset) 854 { 855 #ifdef DEBUG_MIDI 856 snd_printk(KERN_DEBUG "NRPN, ch#: %i, inst#: %i\n", 857 chan->number, chan->midi_program); 858 #endif 859 } 860 861 /* 862 * receive sysex 863 */ 864 void snd_opl3_sysex(void *p, unsigned char *buf, int len, 865 int parsed, struct snd_midi_channel_set *chset) 866 { 867 #ifdef DEBUG_MIDI 868 snd_printk(KERN_DEBUG "SYSEX\n"); 869 #endif 870 } 871