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